News

Saturday, Dec 09, 2017

Many people attribute ring seating problems to the brand of rings installed.

If the cause is poor cylinder preparation, faulty installation, or a bent connecting rod, the rings are sure to get the blame.

Piston rings have one of the hardest jobs in the engine, to seal the combustion chamber while removing heat from the piston.

We have used Triumph ring sets from Hastings, Total Seal, Deves, Grant, Hepolite, Goetze, Riken, JCC, and a few others. The result was almost the same with each brand…

They all did a great job when gapped correctly, carefully installed in a round bore, and were allowed to break in without any extreme circumstances.

We are proud to announce that we now have Grant piston rings in stock for the Triumph 650. This set consists of a torsional twist (inner bevel) top and second ring, with a one piece cast oil ring. They are designed to break in quickly and give good service life.

These cast iron rings are made in California as they have been since the company was founded in the 1920′s in a house in Los Angeles. Grant rings have won races on drag strips, Bonneville Salt flats, stock car, and countless other events.

Franz and Grubb has used Grant rings with great success and is happy to supply this excellent American made ring set.

Tuesday, Nov 03, 2015

Every set of pistons we have ever sold has been checked for weight on a gram scale, and inspected for defects. Our strict quality control doesn’t cost any extra, and our installation notes will help you to get it right the first time. 650 Pistons can be found here
Complete installation notes are available on out tech page, or by clicking here

Tuesday, Mar 12, 2013

Wednesday, Jul 25, 2012

If you are looking for a 650 ring set without a chrome top ring, we have them in stock for 650 Triumph at a reasonable $39.95 set. These sets by Hastings Mfg are made in the USA and will require file fitting end gap for proper size. Available in Standard, .020″, .040″, .060″, and .080″ bore sizes, and are suitable for Unit and Pre Unit pistons.